:root {
  --primary-color: #1e5799;
  --primary-gradient: linear-gradient(135deg, #1e5799 0%, #207cca 100%);
  --sidebar-bg: #304156;
  --card-border: #e6e6e6;
  --shadow-light: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
  --shadow-dark: 0 4px 20px rgba(0, 0, 0, 0.15);
  --success: #67c23a;
  --warning: #e6a23c;
  --danger: #f56c6c;
  --info: #909399;
}